I've voted for Corbyn twice for leader and voted Lab twice for my MP in 2 years.
Corbyn is unelectable because he doesn't appeal to Middle England. Even in a referendum where Middle England voted Labour in order to get a sensible Brexit deal he still couldn't appeal to Middle England to turn Blue to Red.
This is the problem with you, Pole, Bigga and a few others. Everybody is an enemy. Tories are an enemy, Blairites are the enemy, Lib Dems are the enemy. Literally everybody who doesn't fit your exceedingly narrow political opinion is an enemy and a traitor and evil and doesn't give a shit about anyone. You guys are two steps away from strapping bombs to yourself so radicalized and full of hatred for other opinions you have become.
Politics IS compromise. That's how it works, that's how it runs, that how it operates when militants like you are back arguing on forums after elections and the business of running the country is in order. The Tories work with Labour hundreds of times a day in collaborative efforts either through Cross Party Commissions, enquiries, Minister shadowing, legislative Committees on each Bill, and a bunch of other stuff. They sit in the same "canteens" at the same tables talking to each other over lunch about the issues of the day.
Your view of how politics works is childish and not how legislative assemblies function to any degree at all. Your hyper partisanship is only fermented because you're a useful idiot to have when it comes to campaigning or raising funds. The rest of the time you're ignored not because the Government are some snobs who have forgotten their roots but because your opinions cannot be compromised, which makes you both unneeded because of your predictableness, and undesired because you're a roadblock to sensible compromise.
It's like you've never actually sat in meetings with people who don't agree with you. For all of the talk of humanity, many of your far left persuasion seen to lack a basic grasp of it.